Adjustable gib



Aug. 20, 1929. A. WALLACE 1,725,725

ADJUSTABLE GIB Filed July 1, 1929 Patented Aug. '20, 1929.

PATENT OFFICE.

ALLEN WALLACE, OF MOORESTOWN, NEW JERSEY.

ADJUSTABLE GIB.

Application filed July 1,

The object of my invention is to improve the construction of the gibs which are located on the pedestals of a locomotive or truck frame and on which the axle boxes move,

whereby the boxes can be adjusted when wear takes place between the wear plates on the axle boxes and the hubs of the wheels.

In the accompanying drawing:

Fig. 1 is a sectional plan view of the two side frames of a locomotive, with axle boxes mounted therein, the axle being shown in full lines;

Fig. 2 is a view similar to Fig. 1, showing the gibs adjusted to take up the wear between the wear plates on the boxes and the hubs of the wheels;

Fig. 8 is a side view of a portion of the locomotive frame illustrating the improved gibs;

Fig. 4; is a perspective view of the gib adapted to the vertical face of one pedestal; and

F 5 is a tapered gib adapted to the inclined face of the other pedestal.

Referring to the drawings, 1 is the frame of a locomotive or truck, having pedestals 2-2" of any suitable type. These pedestals of the locomotive frame are arranged in pairs as shown in Fig. 3, the pedestals 2 having a vertical face, and the pedestal 2 having an inclined face against which bears the beveled face of the wedge-shaped gib 11. The gib 10 is of even thickness throughout as shown in Fig. 4.

3 is the axle adapted to boxes 4 of any suitable type, and each box has inner and outer flanges 5 which extend beyond the gibs and the pedestals as shown and hold the box against longitudinal movement.

The gib 10 has two flanges fitting between the flanges 5 of the box and the pedestals, the flange 12 being much narrower than the flange 18.

The gib 11 is formed in like manner and the flange 12 of this gib is narrower than the flange 13.

On the inner end of each box 4 is a flange 6 to which is secured a wear plate 7 by rivets 8 or other fastenings.

9 are the wheels which have hubs 14. These wheels are mounted on the axle 3 as shown in Figs. 1 and 2. As the wear plates and the hubs are worn, there is considerable longitudinal movement of the axle, and when 1929. Serial No. 375,114.

this has reached a certain extent, then the gibs 10 and 11 are removed, the gib 10 being reversed and placed again in position, with the thick flange on the inside, and the left-hand tapered gib or wedge 11 is transferred from the left-hand oedestal to the pedestal on the right-hand side of the frame of the locomotive, and the right-hand tapered gib is moved to the left side of the frame, thus taking up the wear as shown in Fig. 2.

In the event of both gibs having their inner and outer faces parallel as in Fig. 4, then it is not necessary to transfer the gibs from one side of the frame of the locomotive to the other, but they can simply be reversed.

While I have shown one gib with parallel surfaces and one with tapered surface per box, it should be understood that two parallel gibs per box or two tapered gibs per box can be used if preferred.

I claim:

1. The combination of a frame of a locomotive or truck, having pedestals; a box mounted therein; and gibs located between the box and the frame, each gib having a thin flange at one side and a thicker flange at the opposite side, so that the gibs can be reassembled to take up the wear.

2. A gib having a body portion located between the pedestals of a frame, said gib having two flanges, one flange being at one side of the gib and the other at the opposite side thereof, one of the flanges being comparatively thin in cross-section, and the other flange being thicker than the first-mentioned flange, so that the gibs can be re-arra'nged in the frame of a locomotive or car truck to take up wear.

8. The combination in a frame of a locomotive or truck, the frame having two pedestals, one of which has a vertical surface and the other an inclined surface, of a box having parallel sides; two gibs, one gib having inner and outer faces parallel and having flanges at each side, one flange being thicker than the other flange, the other gib being in the form of a wedge and having two flanges, one flange being thicker than the other flange; an axle mounted in the boxes; and wheels on the axle, the gibs being re-arranged when wear takes place between the hubs of the wheels and the wear plates on the axle boxes.

ALLEN WALLACE. 

